Function dav_parse_range

modules/dav/main/mod_dav.c:858–900

* @return 1 if valid content-range, * 0 if no content-range, * -1 if malformed content-range */

 *         -1 if malformed content-range
 */
static int dav_parse_range(request_rec *r,
                           apr_off_t *range_start, apr_off_t *range_end)
{
    const char *range_c;
    char *range;
    char *dash;
    char *slash;

    range_c = apr_table_get(r->headers_in, "content-range");
    if (range_c == NULL)
        return 0;

    range = apr_pstrdup(r->pool, range_c);
    if (ap_cstr_casecmpn(range, "bytes ", 6) != 0
        || (dash = ap_strchr(range + 6, '-')) == NULL
        || (slash = ap_strchr(range + 6, '/')) == NULL) {
        /* malformed header */
        return -1;
    }

    *dash++ = *slash++ = '\0';

    /* detect invalid ranges */
    if (!ap_parse_strict_length(range_start, range + 6)) {
        return -1;
    }
    if (!ap_parse_strict_length(range_end, dash)
            || *range_end < *range_start) {
        return -1;
    }

    if (*slash != '*') {
        apr_off_t dummy;

        if (!ap_parse_strict_length(&dummy, slash)
                || dummy <= *range_end) {
            return -1;
        }
    }

    /* we now have a valid range */
    return 1;
}

/* handle the GET method */
static int dav_method_get(request_rec *r)